102020011011 has 24 divisors (see below), whose sum is σ = 150304854960. Its totient is φ = 66662055936.

The previous prime is 102020011003. The next prime is 102020011031. The reversal of 102020011011 is 110110020201.

It is a happy number.

It is not a de Polignac number, because 102020011011 - 2³ = 102020011003 is a prime.

It is a super-2 number, since 2×102020011011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102020010984 and 102020011002.

It is not an unprimeable number, because it can be changed into a prime (102020011031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106110 + ... + 464003.

It is an arithmetic number, because the mean of its divisors is an integer number (6262702290).

Almost surely, 2^102020011011 is an apocalyptic number.

102020011011 is a deficient number, since it is larger than the sum of its proper divisors (48284843949).

102020011011 is a wasteful number, since it uses less digits than its factorization.

102020011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570515 (or 570512 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 102020011011 its reverse (110110020201), we get a palindrome (212130031212).

The spelling of 102020011011 in words is "one hundred two billion, twenty million, eleven thousand, eleven".